Volume 77, Issue 1

January 1950

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ARTICLES

Local Production of Mesons at 11,300 Feet

O. Piccioni

Phys. Rev. 77, 1 (1950) - Published 1 January, 1950

On the Secondary Particles of Local Penetrating Showers

O. Piccioni

Phys. Rev. 77, 6 (1950) - Published 1 January, 1950

The Effect of Screening on Beta-Ray Spectra and Internal Conversion

John R. Reitz

Phys. Rev. 77, 10 (1950) - Published 1 January, 1950

Nuclear Disintegrations as Detected with Electron-Sensitive Emulsions Exposed in the Stratosphere

J. J. Lord and Marcel Schein

Phys. Rev. 77, 19 (1950) - Published 1 January, 1950

Systematics of Alpha-Radioactivity

I. Perlman, A. Ghiorso, and G. T. Seaborg

Phys. Rev. 77, 26 (1950) - Published 1 January, 1950

The Beta-Spectra of ${Cl}^{38}$

Lawrence M. Langer

Phys. Rev. 77, 50 (1950) - Published 1 January, 1950

The Heavy Nuclei of the Primary Cosmic Radiation

H. L. Bradt and B. Peters

Phys. Rev. 77, 54 (1950) - Published 1 January, 1950

Assignment and Disintegration Scheme of the 6.75-Hour Molybdenum

D. N. Kundu, John L. Hult, and M. L. Pool

Phys. Rev. 77, 71 (1950) - Published 1 January, 1950

Assignment and Characteristic Radiations of the 14-day Tin Activity

E. C. Mallary and M. L. Pool

Phys. Rev. 77, 75 (1950) - Published 1 January, 1950

Microwave Spectrum and Molecular Constants of Hydrogen Cyanide

James W. Simmons, Wallace E. Anderson, and Walter Gordy

Phys. Rev. 77, 77 (1950) - Published 1 January, 1950

On the Emission Bands of CCl

Putcha Venkateswarlu

Phys. Rev. 77, 79 (1950) - Published 1 January, 1950

Straggling of Electrons near the Critical Energy. II

L. Eyges

Phys. Rev. 77, 81 (1950) - Published 1 January, 1950

Dimensional Effects Resulting from a High Dielectric Constant Found in a Ferromagnetic Ferrite

Frank G. Brockman, P. H. Dowling, and Walter G. Steneck

Phys. Rev. 77, 85 (1950) - Published 1 January, 1950

The Influence of Nuclear Structure on the Hyperfine Structure of Heavy Elements

Aage Bohr and V. F. Weisskopf

Phys. Rev. 77, 94 (1950) - Published 1 January, 1950

On the $α - β$ - and $α - K$ -Branching of the Heaviest Natural and Artificial Radioactive Substances

W. Jentschke

Phys. Rev. 77, 98 (1950) - Published 1 January, 1950

On the Disintegration Products of the 2.2-μSec. Meson

E. P. Hincks and B. Pontecorvo

Phys. Rev. 77, 102 (1950) - Published 1 January, 1950

A Study of the Spectra of Columbium and Molybdenum in the Extreme Ultraviolet

George W. Charles

Phys. Rev. 77, 120 (1950) - Published 1 January, 1950

Electronic Specific Heats in Tungsten and Zinc

A. A. Silvidi and J. G. Daunt

Phys. Rev. 77, 125 (1950) - Published 1 January, 1950

$l$ -Type Doubling in Polyatomic Molecules and Its Application to the Microwave Spectrum of Methyl Cyanide and Methyl Iso-Cyanide

Harald H. Nielsen

Phys. Rev. 77, 130 (1950) - Published 1 January, 1950

Letters to the Editor

The Angular Correlation of Scattered Annihilation Radiation

C. S. Wu and I. Shaknov

Phys. Rev. 77, 136 (1950) - Published 1 January, 1950

The Optical Detection of Radiofrequency Resonance

M. H. L. Pryce

Phys. Rev. 77, 136 (1950) - Published 1 January, 1950

The Beta-Spectrum of ${Ca}^{45}$

P. Macklin, L. Feldman, L. Lidofsky, and C. S. Wu

Phys. Rev. 77, 137 (1950) - Published 1 January, 1950

Temperature Dependence of Scintillation Pulses in Anthracene

G. G. Kelley and M. Goodrich

Phys. Rev. 77, 138 (1950) - Published 1 January, 1950

A 7 × $10^{- 9}$ sec. Isomeric State in ${}_{79}{Au}^{197}$

F. K. Mcgowan

Phys. Rev. 77, 138 (1950) - Published 1 January, 1950

Lifetimes of Excited States of ${Au}^{197}$ , ${Fe}^{57}$ , ${Cd}^{111}$ , ${Hg}^{198}$ , and ${Tl}^{203}$

Martin Deutsch and W. E. Wright

Phys. Rev. 77, 139 (1950) - Published 1 January, 1950

Applications of Total Reflection of Neutrons

M. Hamermesh

Phys. Rev. 77, 140 (1950) - Published 1 January, 1950

Note on Rotational Universe

C. Y. Fan

Phys. Rev. 77, 140 (1950) - Published 1 January, 1950

On the Hyperfine Structure of the ${}^{2}P_{\frac{1}{2}}$ State of ${Tl}^{205}$ and ${Tl}^{203}$

A. Berman, P. Kusch, and A. K. Mann

Phys. Rev. 77, 140 (1950) - Published 1 January, 1950

The Electric Quadrupole Moment of the Deuteron

G. F. Newell

Phys. Rev. 77, 141 (1950) - Published 1 January, 1950

Functions Used in Flügge's Method of Predicting Approximate Spatial Neutron Distributions

L. Secrest

Phys. Rev. 77, 141 (1950) - Published 1 January, 1950

Radioactive Xenon 125, and Xenon 127

D. L. Anderson and M. L. Pool

Phys. Rev. 77, 142 (1950) - Published 1 January, 1950

Units of Radioactivity

L. F. Curtiss, R. D. Evans, Warren Johnson, and Glenn T. Seaborg

Phys. Rev. 77, 142 (1950) - Published 1 January, 1950

Effect of ${He}^{3}$ on the $λ$ -Point of ${He}^{4}$

O. K. Rice

Phys. Rev. 77, 142 (1950) - Published 1 January, 1950

Processes Involving Vector Mesons

James N. Snyder

Phys. Rev. 77, 143 (1950) - Published 1 January, 1950

Ultrasonic Interferometry for Low Acoustic Impedance

James L. Stewart and Ellen S. Stewart

Phys. Rev. 77, 143 (1950) - Published 1 January, 1950

Cosmic Radiation and the Maintenance of a Potential Gradient in the Atmosphere

S. A. Korff

Phys. Rev. 77, 144 (1950) - Published 1 January, 1950

Dispersion in N $H_{3}$ in the Microwave ${Region}^{1}$

George Birnbaum

Phys. Rev. 77, 144 (1950) - Published 1 January, 1950

Field Dynamics. I. Classical

K. V. Roberts

Phys. Rev. 77, 146 (1950) - Published 1 January, 1950

Field Dynamics. II. Quantum

K. V. Roberts

Phys. Rev. 77, 146 (1950) - Published 1 January, 1950

Determination of $g$ -Values in Paramagnetic Organic Compounds by Microwave Resonance

A. N. Holden, C. Kittel, F. R. Merritt, and W. A. Yager

Phys. Rev. 77, 147 (1950) - Published 1 January, 1950

Hyperfine Structure and Exchange Narrowing of Paramagnetic Resonance

C. H. Townes and J. Turkevich

Phys. Rev. 77, 148 (1950) - Published 1 January, 1950

Microwave Spectrum of C $H_{2}$ CFCl

J. K. Bragg, T. C. Madison, and A. H. Sharbaugh

Phys. Rev. 77, 148 (1950) - Published 1 January, 1950

ERRATA

Erratum: A Theory of Pressure Absorption

Masataka Mizushima

Phys. Rev. 77, 149 (1950) - Published 1 January, 1950

Letters to the Editor

Coherent Scattering of X-Rays by Atoms with More Than One Electron According to the One-Electron Theory and the Positron Theory

E. Arnous

Phys. Rev. 77, 149 (1950) - Published 1 January, 1950

On the Treatment of Quantum Electrodynamics without Eliminating the Longitudinal Field

Ning Hu

Phys. Rev. 77, 150 (1950) - Published 1 January, 1950

On the Infra-Red Absorption of the Hydrogen Molecule

Masataka Mizushima

Phys. Rev. 77, 150 (1950) - Published 1 January, 1950

Search for Photons Emitted by Long-Life Species of Nickel

D. G. Thomas and J. D. Kurbatov

Phys. Rev. 77, 151 (1950) - Published 1 January, 1950

Non-Linear I-V Characteristic of Ge at Very Low Temperatures

F. K. Du Pré

Phys. Rev. 77, 152 (1950) - Published 1 January, 1950

A Preliminary Report on the Fine Structure of the Microwave Absorption Spectrum of Oxygen

James H. Burkhalter, Roy S. Anderson, William V. Smith, and Walter Gordy

Phys. Rev. 77, 152 (1950) - Published 1 January, 1950

Lifetimes of Mercury and Potassium Atoms in Excited States

B. Mishra

Phys. Rev. 77, 153 (1950) - Published 1 January, 1950

On the Nature of the $π$ -Meson

B. Ferretti and S. Gallone

Phys. Rev. 77, 153 (1950) - Published 1 January, 1950